ETE Nova Alianca - Secondary Wastewater Treatment Plant in Nova Alianca, Sao Paulo, Brazil

ETE Nova Alianca is a municipal wastewater treatment plant located in Nova Alianca, a city in the state of Sao Paulo, Brazil. The facility serves a population of about 5,011 people, placing it in the small agglomeration category under Brazilian wastewater management frameworks. The plant is situated in the southeastern region of Brazil, an area characterized by tropical climate and significant agricultural activity. The plant provides secondary treatment, which is the standard level required for most urban wastewater in Brazil under national regulations. Secondary treatment typically involves biological processes to reduce organic matter and suspended solids. The plant discharges an average of 675.52 cubic meters of treated wastewater per day. The plant operates within Brazil's regulatory framework, which mandates compliance with CONAMA resolutions for effluent quality. The treated effluent from ETE Nova Alianca is discharged into local water bodies that ultimately drain into the Parana River basin, one of the largest river systems in South America. The Parana River flows southward through Brazil, Paraguay, and Argentina before emptying into the Rio de la Plata estuary.

The plant's discharge enters the Parana River basin, which flows through the interior of Sao Paulo state and eventually reaches the Rio de la Plata estuary. This watershed supports diverse aquatic life and is important for regional water supply and agriculture. The proximity to the coast (within 10 km) means that nutrients and pollutants from the discharge could affect coastal ecosystems, including mangroves and estuarine habitats. Effective secondary treatment is critical to minimize eutrophication risks in downstream water bodies.